Refrigerator



REFRIGERATOR Filed Feb. 23. 1927 y2 Sheets-Sheet 2 y( A?. l l

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Patented Apr. 24, 1928.

SEBASTIAN e. BBINXMAN, or rnafrn Annoy, NEW maaar.

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Application u led February, 1927. Serial No. 170,363.

This invention relates to improvements in refrigerators, and more particularly to a double or spaced wall piorcelain refrigerator, and the method of ma ing the'same. An object of the invention is to provide a refrigerator formed of a plurality of cooperating compartments, each compartment be -ing built with spaced porcelain. walls, be-

tween which is a vacuum, or if desired, dead air may be trapped therebetween.

A further ob]ect of the invention is to provide suitable means and a novel process whereby the spaced walled porcelain boxes or compartments ma be molded and baked.

A still further obgectof the invention is to provide a process whereby 'the spaced walled porcelain compartments ma be reinforced and further provided wit ineens whereby the usual refrigerator fittings may be supported. v 1

Other objects will appear as the description proceeds.

` In the accompanying drawings lwhich form a part of my application,

Figure 1 is a perspective view of a refrigerator made in accordance with my invention;

Figure 2 is a sectional view taken on the line 2--2 of Figure 3;

Figure 3 is a sectional view taken on the line 3-'-3 of Figure 2;

Figure 4 is a front elevation of the outer plaster mold;

Figure 5 is a sectional View taken on the line 5-5 of Figure 6, and

Figure 6 is a sectional view taken on the line 6-6 of ,Figure 5.

Like characters of reference are used l throughout the following specification and the accompanying drawings to designate corresponding parts.

In brief, I provide a porcelain refrigerator composed of one or more integrally formed spaced walled compartments, which are sealed or closed by means of ldoors formed in the same manner and from the same material.

The refrigerator compartments 20 are formed inthe following manner: A working table 1 is provided for supporting the mold and has an openin 2 cut through it near its central portion cfg a size jcorres onding to the largest outsidedimension ci) the inner mold. The core 3 is formed with four sides and a top, and is open at its bottom. The lower portion of the inner core 3 is outwardly flared as at 4, to provide for the bevel usually found in the front of refrigerator compartments, and cooperates with a correspondingly beveled surface of adoor, to form a tight joint. It will be seen that the core 3 is slidable within the opening 2, and is supported by the table in any suitable manner. The top of the core 3 is closed except for a central opening 5, the sides of which are beveled and cooperate with the tioned about the core 3, and sea-ts on the annular flange about the lower `edge of said core. The plate 8 is supported on the table l, and supports the mold 9 in spaced rela- 75 tion to the core 3. The mold 9 comprises 4four interlocking walls of plaster and is provided with an interlocking removable top 10. When the base plate, core and mold u re in position, the several joints between the saine are sealed with clay to prevent leakage of the slip when poured in the mold. A tillingtube or pipe 11 of brass extends into the space between the core and mold, while an overflow pipe 12 also extends through the ss upper portion of the mold 9 to let the air out of the mold and to give warning when the mold is completely filled with the clay slip.

A drain pipe 13 extends upward into the space between the core 3, and mold 9, and is ao used to drain olf the undesired portion of the clay slip, after the walls of the compartment being molded have been formed to the desired thickness. This operation is usually calculated by time, since the plaster between vide passages in the refrigeratorcompartments 20, for the passage of air through the same, or through several comlpartments. rlhe plugs 14 being made of p aster, will also cause the clay slip to form a wall about the same. Likewise the spaced walls ofthe compartmcnts will be reinforced, by lnserting plaster plugs 16 through the core 3, and permitting the clay slip to build up around the same. Plugs 17 will be inserted through the core 3 to form openings in the inner wall or surface of the compartments to receive supporti-ng means for the trays 18. The compartments will be so formed that the passages 15 are in alinement with similar passages in other compartments, so that a circulation of air may be had between the several compartments of the refrigerator.

Assuming that the core and mold are in position, the method of making the compartments is as follows: The space between the core and mold is completely filled with a clay slip, through a funnel in the filling pipe, until the slip starts to run out of the overflow` pipe 13, at which time the overflow pipe is closed by means of a suitable plug. Of course the funnel is kept full of the slip. The slip is permitted to set for a proximately four hours, during which time, the moisture will be drawn out into the plaster walls of the core and mold, and spaced walls will be built up from the slip. The drain plug is then removed and all of the slip remaining in liquid form will be drained from the mold. At the same time an air line will be connected to the filling pipe .and a low pressure of air will be directed into the space between the Walls formed by the slip. In this manner the upper or outer wall formed b the slip will be supported on an air cus ion, and will be kept from colla sing. After this the core is lowered throu i the` central opening in the table, while the supporting head is tfield in its raised osition tosupport the inner horizontal wall formed by the slip. After a predetermined length of time the air may be turned of and the supporting head lowered through the opening in the table, and the mold taken apart. It will thus be seen that a spaced walled compartment will be formed, having reinforced walls. The refrigerator fittings may be applied in any suitable manner. It will be understood that the doors for the compartments will be formed in the same manner, but with different molds. Tlie compartment Walls will be approximately one half inch in thickness, while the space therebetween will also be approximately one half inch. The box or compartment will usually be fired in a kiln while in a biscuit state, after which a plurality of glazing coats will be applied to the box, which will then be burned a second time in a gloss kiln, to form the completed The compartments From Figure 2 of the drawings, it will be apparent that the compartment on the upper right hand corner will be the ice compartment, and that the cold air will pass down through the passage into the lower right hand com artment, and from there to the lower le t hand compartment, and up into the upper left hand compartment, and finally back into the up r right hand compartment. Hence a comp ete circulation of the air in the several compartments will be had, thereby keeping the temperature in the compartments at a' fairly even. degree. It will be apparentl that no insulating material will be used as in the ordinary form ofrefrigerators, and the vacuum or dead air between the spaced walls will serve to.

retain the cold within the compartments. Of course, the compartments could be used just as successfully as a medium for heating, as the double spaced wallsconstruction renders the compartments thoroughly air tight and insulated.

Many minor changes in detail of construction may be resorted to without departure from the spirit of the invention.

Having thus described my invention what I claim as new and desire to secure by Let-y ters Patent of the United States is:

1. A refrigerator includin a plurality of molded spaced double wa led porcelain refrigerator units, each having spaces for a vacuum between its walls, and integrally formed reinforcing areas built up between the several walls of each unit.

2. A refrigerator includin a plurality of separate molded spaced doub e walled porcelain refrigerator units, each having spaces for a vacuum between its walls, and registering air 1passages formed through the adjacent wal s of said units.

3. A refrigerator including a plurality of separate mo ded spaced double walled porcelain refrigerator units, each having spaces for a vacuum between its Walls, registering air passages formed through theadjacent l walls of said units, and molded areas formed in the side walls of said units adapted to4 receive tray supporting elements.

4. A refrigerator including a plurality of separate porcelain refrigerator units, each of which is provided with spaces for a. vacuum between its walls, the adjacent Walls of adjacent units having alined registering air passages to permit the circulation of cold air through said units, and internal means for holding said units together.

5. A refrigerator including a plurality of separate porcelain refrigerator units, each of which is provided with spaces for a vacuum between tering and interlocking air passages the same, and means for holding said units 1 together.

its walls, said units having regisetween i In testimony whereof I aix my signature.

SEBASTIAN G. BRINKMAN. 

